On Fri, 16 Nov 2018, Paul Richard Thomas wrote:

> Could somebody explain why this is happening to those not versed in
> these problems with office365 ?

Every receiver of email decides the policies under which it 
will accept it, or indeed, whether it will accept an offered 
piece at all.  Anti-spam defense systems are the most common 
reason offered

The owners of the Office 365 product, and those of Gmail have 
(probably) decided that the content from the list 'looks 
spammy' ... their choice, and that decision is applied on 
behalf of their subscribers.  Also, to avoid 'educating' 
senders of unsolicited email how to evade such restrictions, 
the criteria shift without notice and may get tighter or 
looser, depending on the whim of the email receiver that day


The alternative approach is for a email receiver is to simply 
'mark' such as with a spam-assassin score, their opinion as to 
how 'spammy' something is, and permit the mail user client to 
decide what to do with it 

I run under that latter system, and I see this as to your 
question piece:

Return-Path: <[log in to unmask]>
X-Spam-Checker-Version: SpamAssassin 3.3.2-r929478 
(2010-03-31) on (elided)
X-Spam-Level: 
X-Spam-Status: No, score=-0.8 required=4.0 tests=BAYES_00,
    DKIM_ADSP_CUSTOM_MED,
    DKIM_SIGNED,FREEMAIL_FROM,
    T_DKIM_INVALID autolearn=no version=3.3.2-r929478


The theory is that an unhappy subscriber will complain, or go 
elsewhere

These questions should properly be directed to your email 
handling firm (here: Microsoft or Google)

-- Russ herrold